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Amedlous A, Hélaine C, Guillet-Nicolas R, Lebedev O, Valable S, Mintova S. Gadolinium-loaded LTL nanosized zeolite for efficient oxygen delivery and magnetic resonance imaging. Inorg Chem Front 2023. [DOI: 10.1039/d3qi00169e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
The search for efficient gas carriers for biomedical applications presents a challenging task due to the kinetics of gas adsorption/desorption. This article presents a novel approach utilizing Gd-LTL zeolite crystals for oxygen delivery combined with an MRI study.
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Affiliation(s)
- Abdallah Amedlous
- Normandie Université, ENSICAEN, CNRS, Laboratoire Catalyse et Spectrochimie (LCS), 14050 Caen, France
| | - Charly Hélaine
- Normandie Université, UNICAEN, CNRS, ISTCT, GIP CYCERON, 14000 Caen, France
| | - Rémy Guillet-Nicolas
- Normandie Université, ENSICAEN, CNRS, Laboratoire Catalyse et Spectrochimie (LCS), 14050 Caen, France
| | - Oleg Lebedev
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire de Cristallographie et Science des Matériaux (CRISMAT), 14050 Caen, France
| | - Samuel Valable
- Normandie Université, UNICAEN, CNRS, ISTCT, GIP CYCERON, 14000 Caen, France
| | - Svetlana Mintova
- Normandie Université, ENSICAEN, CNRS, Laboratoire Catalyse et Spectrochimie (LCS), 14050 Caen, France
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Confalonieri G, Vezzalini G, Maletti L, Di Renzo F, Gozzoli V, Arletti R. Ion exchange capacity of synthetic zeolite L: a promising way for cerium recovery. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:65176-65184. [PMID: 35478397 DOI: 10.1007/s11356-022-20429-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 04/20/2022] [Indexed: 06/14/2023]
Abstract
The increasing rare earth elements' (REE) demand to meet the market request and the current political scenario show that it is essential to find good solutions to recover these elements from waste (both industrial and mining). Zeolites are microporous materials with high cation exchange capacity, up to now only little investigated for REE recycle. Here, we propose the use of NH4+-exchanged zeolite L for Ce recovery from a very diluted solution (0.002 M), mimicking the Ce3+ concentration of the liquors deriving from the leaching of spent catalysts. The aim of this work is twofold: (i) to investigate the exploitability of zeolite L as cation exchanger in the Ce recovery; and (ii) to determine the best working conditions. The investigated process consists of a coupled cation exchange: (1) in the first exchange the NH4+ cations - present in the zeolite porosities - are exchanged with the Ce3+ ions in the solution; and (2) in the second experiment, the Ce3+ trapped into the zeolite is recovered through a further exchange with NH4. The best working conditions for Ce3+ exchange of NH4-zeolite L are: batch system, liquid/solid ratio equal to 90 mL/g and 180 mL/g, 24 h of contact at 25 °C. The resulting Ce adsorption capacity (qt) is equal to ~25 mg/g and ~39 mg/g and the removal efficiency 100% and 77% for the two tested liquid/solid ratios, respectively. The kinetics was proved to be fast and consistent with industrial timing; no energy cost for temperature setting is required; and the acid pH (~4) of the solutions does not affect the zeolite structure stability and its exchange performance. It has been demonstrated that the zeolite framework is not affected by the exchange so that the same absorbent material can be employed many times.
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Affiliation(s)
- Giorgia Confalonieri
- ID22, Structure of Materials European Synchrotron Radiation Facility 71, Avenue des Martyrs, 384043, Grenoble, France
| | - Giovanna Vezzalini
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi, 103, 41125, Modena, Italy
| | - Laura Maletti
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi, 103, 41125, Modena, Italy
| | - Francesco Di Renzo
- ICGM, University of Montpellier, CNRS, ENSCM, Centre Balard, 1919 Route de Mende, 34090, Montpellier, France
| | - Vittorio Gozzoli
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi, 103, 41125, Modena, Italy
| | - Rossella Arletti
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi, 103, 41125, Modena, Italy.
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